Improvement in the manufacture of glue



2 Sheets--Sheet1.

W. PLUMER.

Manufacture of Giue.

' Patentedjuly29,1873.

2 Sheets--Sheet 2.

W. PLUMER. Manufacture of Glue.

N0.141,379, Patentedluly29,1873.

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WVILLIAM PLUMER, OF LEXINGTON, MASSACHUSETTS.

IMPROVEMENT IN THE MANUFACTURE OF GLUE.

Specification forming part ofLetters Patent No. 141,379, dated July 29, 1873; application filed January 29, 1873.

To all whom it may concern:

Be it known that I, WILLIAM PLUMER, of Lexington, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Apparatus and Process for Making Glue, of which the following is a specification 1 My invention relates to the manufacture 0 glue; and it consists in an apparatus and method or process of applying a current of dry air, either hot or cold, to the glue, for the purpose of drying and curing the same, as hereinafter more fully explained.

Figure l is a sectional elevation of a building or compartment, and Fig. 2 a top-plan view of my apparatus. Figs. 3 and 4eare elevations of portions of the apparatus, enlarged, for the purpose of more clearly illustrating their construction.

In constructing my apparatus I provide a suitable building, which, for convenience, I have represented as being divided into two compartments, A and B. In one of these compartments, A, I then erect one or more cases, 0, which are divided longitudinally into three, more or less, air-tight chambers, as represented in Figs. 1 and 3. These chambers are provided with vertical rows of cleats or ribs 6, Fig. 3, to receive and hold the pans or trays to receive the liquid glue preparatory to applying the current of air to dry and solidify it. These cases are provided, on one or both sides, with a series of doors, a, by which the trays can be filled and removed at will, or as occasion may require. The cases 0 are connected at one end, by suitable pipes t, to a heater, D, which may consist of a steam-chest having a series of air-pipes passing through it, as represented in Fig. 1, theair being drawn through the heater D, and also through the compartments of the case 0, by a fan, G, arranged at the opposite end of the case, as shown; though, if desired, the fan may be arranged to force instead of draw the air through the heater and the case, the air being discharged through an outlet-pipe, F, arranged in any suitable manner. The liquid glue is fed into the trays 0, Fig. 3, by means of a hose-pipe, from a reservoir, and when the trays are supplied the doors are closed and the blast or current applied. The air, as it is heated, is

deprived of its moisture, and as it passes over the trays absorbs the moisture therefrom and conveys it away out of the case or building, and thereby causes a rapid drying and solidification of the liquid glue; and by this means the process of making glue is greatly expedited.

The object of having a series of the cases 0 is so that one may have its trays filled while the others are being operated upon by the current of air, and thus render the process continuous, the pipes t leading to the separate cases 0 being provided with suitable valves or dampers, by which the air can be shut off from any one of them, at pleasure. I also propose to use the same apparatus and process by substituting, in hot weather, in place of the heater D, a similar apparatus containing a refrigerating liquid or mixture, for the purl pose of extracting the moisture from the air before it enters the cases 0, the object in both cases being to present the air to the glue in as dry a state as possible, so as to extract from the glue the greatest possible amount of moisture in the least possible time. pose of thoroughly drying and curin g the glue after it is removed from the trays, and which is done while it is yet soft, I provide the apparatus represented in the compartment B of Figs. 1 and 2, the same being shown on a larger scale in Fig. 4. This consists of a horizontal pipe, H, having a series of vertical pipes, I, connected thereto, with a series of wires, m, arranged in tiers or rows parallel with the pipe H. The pipes I pass down centrally between the wires m, and are perforated at points just above each tier, so that a current or jet of air escapes therefrom nearly opposite each tier, the air being supplied through a pipe, E, Fig. 1, from the same heater or apparatus that supplies the cases 0; though, if desired, it may be supplied from an independent source, and by a separate fan, N. The sheets of glue being laid on the wires m, or on metal sheets placed thereon, are rapidly dried and thoroughly cured by the jets of hot dry air impinging thereon as it escapes from the perforations in the pipes Z. In this case the air escapes into the compartment B, and, in order to carry it With its moisture out of the room, I arrange one or more ventilating pipes, I, which open near the floor, and have a For the pur- By these means, also, the process of making glue is rendered far more rapid than by the methods heretofore in use.

Having thus described my invention, what I claim is- 1. The combination of a series of compartments, 0, provided with an air -blast and dampers for shutting off the blast from any one or more of the series, whereby either of the compartments can be emptied or replenished at will while the others are being operated on by the blast, substantially as described.

2. The combination of the drying frame or racks m with the supply pipe H and the pipes 1, having the narrow slits therein, arranged to deliver the air over or across the pans or racks in a fan-like form, substantially as described.

WILLIAM PLUMER. Witnesses:

BENJ. F. STROMS, Jos. M. GIBBENs. 

